aos.jack.util.cursor
Class EnumerationCursor

java.lang.Object
  aos.jack.jak.util.Watchable
      aos.jack.jak.cursor.Cursor
          aos.jack.util.cursor.EnumerationCursor

All Implemented Interfaces:

ObservableInt

public class EnumerationCursor

extends Cursor

Enumeration cursors iterate over a java.util.Enumeration. True is returned while elements are available in the enumeration; false is returned when the end of the enumeration is reached.

Field Summary

Fields inherited from class aos.jack.jak.cursor.Cursor

FALSE, falseCursor, TRUE, trueCursor, UNKNOWN

Constructor Summary

EnumerationCursor(java.util.Enumeration e)

EnumerationCursor(java.util.Enumeration e, Variable v)

Method Summary

boolean	bindValues(java.lang.Object o)
void	finished() This informs the cursor that it is not going to be used again.
boolean	isTriggered() Returns false.
boolean	next() Used to determine if there are more elements to be bound
void	undo() Undo tells the cursor to backtrack anything it has done.
boolean	unRegister(java.util.Observer o)

Methods inherited from class aos.jack.jak.cursor.Cursor

negate, register, reset

Methods inherited from class aos.jack.jak.util.Watchable

addObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EnumerationCursor

public EnumerationCursor(java.util.Enumeration e)

EnumerationCursor

public EnumerationCursor(java.util.Enumeration e,
                         Variable v)

Method Detail

isTriggered

public boolean isTriggered()

Returns false.

Overrides:

isTriggered in class Cursor

next

public boolean next()

Used to determine if there are more elements to be bound

Specified by:

next in class Cursor

Returns:

True if the are more elements, false otherwise.

undo

public void undo()

Description copied from class: Cursor

Undo tells the cursor to backtrack anything it has done. It is a subset of the reset() functionality since it does not reinitialize the cursor. The only requirement is that any bindings made by the cursor are undone. The state of the cursor after the call is undefined. Most implementations will fail if next() is called after undo() without an intervening call to reset().

Overrides:

undo in class Cursor

finished

public void finished()

Description copied from class: Cursor

This informs the cursor that it is not going to be used again. This is typically used to clean up data strutures and to remove itself from any notification paths.

Overrides:

finished in class Cursor

bindValues

public boolean bindValues(java.lang.Object o)

unRegister

public boolean unRegister(java.util.Observer o)

Overrides:

unRegister in class Cursor